Means for line printing



Sept. 12, 1961 J. R. ROBERTS MEANS FOR LINE PRINTING 2 Sheets-Sheet 1 Original Filed May 18, 1949 4 i Z 1; r I V N M I N. I WW WW N aw w m m mm 2 n I @w U m LSKZZLZ i 4 j L M 2 JOHN SMITH IIO MAIN ST BUFFALO NY.

2 Sheets-Sheet 2 Original Filed May 18, 1949 nited The present invention relates to an improved line printing device, and in particular, to a combined block out and master sheet holder.

This invention is a division of my copending application, Serial No. 93,941 filed May 18, 1949, now Patent No. 2,707,433 dated May 3, 1955.

The aforesaid copending application relates to an improved apparatus and method for printing or duplicating only selected portions of a master sheet on a series of copy sheets, the duplicated portions all appearing in the same relative positions on the copy sheets irrespective of the positions of said selected portions on the master sheet.

Such apparatus and method is of particular utility in duplicating the heading and certain selected items of an order, invoice, or the like. When used for this purpose the heading portion of the master sheet may be separated from the remaining portion to provide a separate heading master and a line master.

An object of the present invention is to provide an improved means for mounting a master sheet, such as the aforesaid heading master for example, on the drum of a duplicating machine so that the position of the master sheet may be readily shifted with respect to the axis of the drum.

A still further object is to provide a combined block out and master sheet holder which is of utility in practioing the invention of the aforesaid copending application.

Other objects, features and advantages of my invention will become apparent as the description proceeds.

With reference now to the drawings in which like reference numerals designate like parts:

FIG. 1 is a plan view of a portion of a duplicating machine embodying my invention;

FIG. 2 is a view of a copy sheet on which has been duplicated portions of the master sheet shown in FIG. 1;

FIGS. 3 and 4 are vertical sections along lines 3-3 and 4-4, respectively, of FIG. 1, showing the drum and the relationship of certain overlying elements;

FIG. 5 is a perspective view of a block out, and

FIG. 6 is a perspective view of the combined block out and master sheet holder.

FIG. 1 shows in plan view a portion of a duplicating machine of a standard type which embodies the particular improvements which comprise my invention and which permit the practice of the method of the aforesaid copending application embodying my invention. The duplicating machine 27 comprises a frame 28, a drum 29 rotatably mounted in said frame, and a feed table (not shown) which is disposed in front of the drum. In this particular duplicating machine, the drum is motor driven, and its operation is controlled by a trip bar (not shown) and a control lever 34-. The drum is provided with the usual grippers 3 5 by means of which a master may be secured to the drum, and the control lever 34 also opcrates the grippers. As shown in FIGS. 3 and 4, the grippers are mounted upon a common shaft 36 in the drum wall. The gripping surfaces of the grippers cooperate with the wall of a groove 38 which runs length wise of the drum in order that the marginal edge of a master sheet may be secured to the drum surface. The

tes atent' Patented Sept. 12, 1961 particular construction of the grippers forms no part of this invention; it is described in greater detail in Hemlund Patent No. 2,117,165 dated May 10, 1938.

The drum is driven in the counterclockwise direction, as viewed in FIGS. 3 and 4. Somewhat forwardly of the grippers, that is, in the counterclockwise direction, there is a slot 39 in the drum wall which does not extend all the way through the wall, a web serving to separate the slot from the interior of the drum. The slot is provided to receive the block out 41 and the combination block out and master carrier 42. An L-shaped cross bar 43 mounted on the end walls of the drum, extends lengthwise of the drum below the slot 39. A number of bar magnets 44 are mounted on the cross bar 43 by means of brackets 45, the cross bar and brackets being made of suitable non-magnetic material. Pole pieces 46 of magnetic material are suitably secured to the poles of the magnets 44 and extend upwardly and project through apertures formed in the web.

The block out elements 41 and 42 each comprisea U-shaped steel clip 47 which is secured to the edge of a piece of flexible material 48. As a flexible material, I prefer to use very thin gauge sheet steel, such as shim steel. However, other flexible materials may be used, such as tracing cloth. When the clip 47 is inserted in the slot 39, it will rest against the web, and will be held in place by the pole pieces and magnets. The pole pieces terminate at or just below the upper surface of the web so as to insure that the clip will be disposed parallel to the axis of the drum. The combined block out and master carrier 42 also includes a flap 49 which is secured, as by spot welding along lines 50, to the main body of flexible material 48 so as to form a pocket to receive the heading master 23. The flap 49 may be just a folded over extension of the flexible material 48, as shown in FIG. 6.

In FIG. 2 is shown a copy sheet on which has been duplicated the heading and the first and second items which appear on the master. The master comprises two portions, the first portion being a heading master 23 and the second portion being a line master 24, these masters being mounted on the drum 29, as shown in FIG. 1, in a manner to be described hereinafter.

In operation, as the drum 29 is rotated, copy sheets are fed from the table (not shown) into contact with the drum or whatever overlies the same. As shown in FIGS. 1, 3 and 4, the line master 24 is secured to the drum by the grippers 35 and the heading master 23 is mounted on the drum by means of the combined block out and master carrier 42. The block out 41 overlies the last three items of the line master, and the combined block out 42 overlies the upper marginal portion of the line master, leaving the first two lines of the line master exposed for duplicating. The spacing 52 between the heading and the items on the copy sheet 25 is determined by the position of the heading master 23 with respect to the combined block out 42. Thus, this spacing can be maintained constant irrespective of the position on the line master of that portion thereof which is to be duplicated. To duplicate the last three lines of the line master the combined block out 42 is shoved up against the block out 41, thereby covering the first two lines, and the block out 41 is then shifted to expose the next three lines. The magnetic means for holding the block outs on the drum permits the shifting of the block outs in an axial direction.

By the use of the combined block out and master holder 42, the position of the heading master can be readily shifted without wrinkling or tearing the master and without touching the same, or soiling the fingers.

Furthermore, where the copy sheet is of such a width rection, a combined block-out and master sheet holder comprising a flexible sheet adapted to overlie a master sheet engaged by said grippers, means on said flexible sheet to carry a second master sheet, the top marginal portion of said flexible sheet being adapted to fit into the slot, and means for retaining said marginal portion in said slot and for permitting the shifting of said blockout and master sheet holder in an axial direction, said flexible sheet having said "top marginal portion formed 10f magnetic material and having a body portion which constitutes a block-out portion, and said means for carrymg a second master sheet constituting a flap portion 'disposed adjacent said marginal portion and overlying "said block-out portion to provide normally contacting surfaces, said flap portion being shorter than said blockout portion, and means for securing the contacting sur- 'faces of said flap and body portions to each other at "certain points which are aligned parallel to said top marginal portion and spaced therefrom so that said points along which said surfaces are secured to each other will 4 overlie the surface of said drum whereby a marginal portion of the second master sheet can be wedged between said surfaces and held in place without crimping the same.

References Cited in the file of this patent UNITED STATES PATENTS 960,488 Bond June 7, 1910 1,026,308 Gilbert May 14, 1912 1,088,798 Smith Mar. 3, 1914 1,321,557 Sampson Nov. 11, 1919 1,827,992 Linderman Oct. 20, 1931 2,195,491 Marchev Apr. 2, 1940 2,215,995 Bellack ..L. Sept. 24, 1 940 2,216,591 Hudson Oct. 1, 1940 2,220,244 Jagger 1 Nov. 5, 1940 2,231,291 Morrison Feb. 11, 1941 2,237,363 Ritzerfeld Apr. 8, 1941 2,260,464 Kropp Oct. 28, 1941 2,398,646 Karback Apr. 16, 1946 2,401,020 Roberts May 28,1946

2,695,559 Levin Nov. 30, 1954 2,730,948 Mitchell Jan. 17, 1956 2,730,949 Mitchell Jan. 17, 1956 FOREIGN PATENTS 561,027 GreatBritain-n' May 2, 1944 

